✨ Add hr_option (Both, High res only, Low res only)

[huchenlei]

Closes #2378.

This PR removes global option control_net_no_high_res_fix, and adds the radio selection for hr option per ControlNet unit.

[huchenlei]

Previously disabling highres pass was available so I guess there is sufficient usecases being explored. Here just some novel uses enabled by this PR.

Now you can use tile model to control highres pass.

ControlNet input image:

Step1: non-highres generation, with canny edge unit:

Step2: Reuse seed. Highres generation with 2 units:

• canny edge (set to lowres pass only)
• tile (input is the generation result from step1) (set to highres pass only)
  

I am not sure whether this method is superior than the img2img upscale method (tile + SD Ultimate upscale script), but at least there is another option now 😄.

[huchenlei]

Tile + SD Ultimate upscale script with same seed:

The highres fix method seem to generate less noisy irrelevant details.

[huchenlei]

[huchenlei]

This feature is also requested in #2249.

[huchenlei]

Direct t2i with tile model, 2x size (1024x1536) and same seed:

Hires result has some slight difference in details, probably because added noise during diffusion process. Conclusion is probably not worth doing tile with hires fix?

[dark-edgelord]

I don't see this option at all in the UI anywhere, even with hiresfix enabled.

[huchenlei]

You need A1111 1.7.0+ for the UI to work properly.

[dark-edgelord]

I have that, but I found out what the issue is. It only shows up when clicking the hires fix check box, not the accordion (that also ticks the box automatically).

Clicking green works, red doesn't.